Celery
Celery is renowned for reducing blood pressure, possibly because it contains the plant chemical 3-n-butyl phthalid, as well as apigenin, one of the flavonoid plant chemicals. It is also an excellent source of potassium, a mineral that balances body fluids and can lower blood pressure in some. Celery also has anti-inflammatory properties and can help reduce pain from arthritis, as well as helping to beat fluid retention. One study found that celery is one of the vegetables most strongly linked with protection from bowel cancer.

Garlic
Fresh garlic contains several compounds, the most important of which is allicin. This has been shown to protect against high blood pressure, infections, candida, indigestion, stomach ulcers and bowel disorders. Several studies have shown that it can reduce harmful cholesterol by about 12 per cent, and inhibits new growth of plaque in the arteries that can lead to heart attack or stroke. Garlic may also inhibit the growth of cancer cells and strengthen the immune system.

Onions
The onion family, including garlic and leeks, are good detoxifiers and are also antiseptic and antibacterial. The sulphur compounds they contain are also linked with protection against strokes, high blood pressure, heart disease and cancers. Just 1g of onion a day is enough to help strengthen the bones. Onions are rich in flavonoids and potassium, which can reduce blood pressure and keep the arteries healthy, and the onion family may also help to keep blood sugar levels even by regulating insulin production.

of course...lose weight...but heard this on TV the other day "Interabdominal fat is the most hazerdous to your health and puts pressure on the internal organs such as kidneys that will increase the blood pressure."

Stress. Elevated cortisol feeds into both sodium retention and the stress keeps the vascular bed overly constricted. If one is "borderline" hypertensive and one were to take something along the lines of a Valium and notice a significant decrease in both systolic and diastolic BP one can be fairly certain stress is too high.
Solution? quit ones crappy biotech job and move someplace calm and relaxed like Chico, CA and set up a BJJ program.

These are very non-specific, general population guidelines mind you.

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"Survival will be neither to the strongest of the species, nor to the most intelligent, but to those most adaptable to change."
C. Darwin